Postcanine dental metrics for hominin fossils from the Omo, Ethiopia, and the comparative dataset

These are data that were analyzed for the taxonomic assignments for the 3.75 Ma to 1.09 Ma hominin postcanine teeth from the Usno Formation and the Shungura Formation, Lower Omo Valley, Ethiopia. The dataset includes the linear dimensions, the morphological scores, and the 2-dimensional occlusal areas of the postcanine teeth from the Omo. We also include the linear dimensions (mesiodistal and buccolingual dimensions) for the comparative sample (hominin fossils that provide important taxonomic context) that were primarily culled from the literature.
, For the Omo hominin sample:
The maximum mesiodistal (MD) lengths and maximum buccolingual (BL) breadths for the Omo teeth were measured by L. Hlusko using Mitutoyo calipers from the original fossils at the Ethiopian Heritage Authority in Addis Ababa. For molars, we report and analyze the BL breadth across the mesial cusps. Each measurement was collected three times, the average used as the data point. If a portion of a crown was broken or heavily worn, compromising our ability to determine the actual dimension of the crown, we did not record that measurement. For the MD dimensions, many of the crowns have interstitial wear. Our MD dimensions report the actual length of the crown as it currently is; we did not attempt to correct for the wear. We excluded measurements from overly-worn (>1mm) Omo teeth.
Cusp area data were collected by Ian Towle from the photographs of the original specimens taken by Franck Guy. When photographed, each molar was oriented so that the occlusal crown area ..., , # Postcanine dental metrics for hominin fossils from the Omo, Ethiopia, and the comparative dataset

[https://doi.org/10.5061/dryad.vq83bk42m](https://doi.org/10.5061/dryad.vq83bk42m)

There are two datasets provided here. Both are uploaded as tab-delimited txt files.

The first contains all of the data collected from the Omo hominin postcanine teeth analyzed in the study presented in the pre-print on PaleorXiv ([https://doi.org/10.31233/osf.io/g7kfx](https://doi.org/10.31233/osf.io/g7kfx)): mesiodistal and buccolingual linear dimensions, morphological scores, and 2-dimensional occlusal cusp areas.

The second dataset contains mesiodistal and buccolingual linear dimensions for 820 teeth that were culled from the published literature for 367 comparative specimens. 

## Description of the data and file structure

## FILE: Hlusko_etal_Omo_data.txt

**Columns:**

**Specimen number** = the unique specimen number associated with each fossil

**Stratigraphy** = the geological stratigraphic hor...,